title: Involvement of the upper digestive tract by systemic neurofibromatosis.
mesh_terms: D004379:Duodenal Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D004384:Duodenoscopy; D005773:Gastroscopy; D006801:Humans; D008297:Male; D008875:Middle Aged; D009456:Neurofibromatosis 1 / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D010190:Pancreatic Neoplasms / Q000175:diagnosis / Q000473:pathology / Q000601:surgery; D013274:Stomach Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery